Dental mixing-slab.



E. F. MEDEARIS.

DENTAL MIXING SLAB.

APPLICATION FILED MAY 29. 1916;

1 21 G 5 1 3 a I Patented Jan. 191?. ll l EUGENE FRANCIS MEDEABIS, 0F QUENEMO, KANSAS.

DENTAL MIXING-SLAB.

Specification of Letters latent.

Patented J an. 2, 1911?.

Application filed May 29, 1916. Serial No. 100,580.

To all whom it may concern:

Be it known that I, EUGENE FnAnors ME- DEARIS, a citizen of the United States, residing at Quenemo, in the county of Osage and State of Kansas, have invented certain new and useful Improvements in Dental Mixing- Slabs; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to mixing slabs and more particularly to those used by dentists.

The object of the invention isto provide a slab of this character equipped with a thermometer for indicating the temperature of the slab which is required to be of a certain temperature when used in connection with certain plastics, the thermometer being so mounted as not to interfere with the use of the slab.

Another object is to so position the thermometer that while it is thoroughly protected it is readily accessible for repairs and other purposes.

With these and other objects in view the invention consists of certain novel features of construction, and the combination and arrangement of parts as will be hereinafter more particularly described and claimed.

In the accompanying drawings: Figure 1 is a plan view of a slab constructed in accordance with this invention; and, Fig. 2 is a transverse section thereof taken on the line 22 of Fig. 1. o

In the embodiment illustrated a mixing slab 1 is shown such as is ordinarily employed by dentists positions and which is constructed of glass. This slab 1 has a cavity or bore 2 extending thereinto from one edge thereof and terminating adjacent the opposed edge whereby it is closed at one end and open at the other and said open end is equipped with a removable closure here shown in the f rm of a stopper 3. This stopper which is preferably made of cork has a seatd in its inner end to receive one end of a thermometer 5, the other end of which is mounted in a seat 6 formed in a cushion 7 disposed in the inner end of the bore 2 whereby when the stopper is inserted the thermometer is securely held against turnlng. This bore 2 is formed for mixing plastic comobliquely being inclined downwardly from its open toward its closed end as shown in Fig. 2 so that mercury will remain in the bulb until driven out by expansion due to the heating of the slab.

The thermometer 5 which is of ordinary construction is disposed within the bore 2 with the scale 8 thereof facing outwardly so that it may be readily read from the upper face of the slab to adapt the dentist to ascertain at a glance the temperature of the slab. As shown the bore 2 extends transversely of the slab which latter is made rectangular in form but obviously the slab may vary in configuration and the position of the bore may also be changed provided that it extends edgewise into the slab and throughout the greater portion of one of the diameters thereof.

By soconstructing the slab the thermometer may be readily removed and inserted so that if desired it may be used for other purposes and only placed in the slab when the latter is to be used. By so mounting the thermometer in the slab it is thoroughly protected and held in position while readily visible and accessible.

I claim:

L-A glass mixing slab having a bore extending from one edge across the greater portion of its length, said bore being open at one end and closed at its other, and inclined inwardly from its open toward its closed end, a thermometer disposed in said bore and having a scale visible through one face of said slab, and a removable closure for the open end of said bore.

2. A glass mixing slab having a bore extending inwardly from one edge thereof, a cushion disposed in the inner end of said bore and having an inwardly opening seat therein, a stopper for the open end of said bore having a seat in its inner end, and a thermometer arranged in said bore with its ends disposed in said seats and held against turning by said cushion and stopper.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EUGENE FRANCIS MEDEARIS.

Witnesses:

M. E. Jones, W. M. EAGLE. 

